JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2015
·Vol. 27
·期 4
·3514-3519
·
IF 1.569
Cao Renping,Fu Ting,Cao Yunling,Jiang Shenhua,Gou Qingdong,Chen Zhiquan,Liu Pan
Novel CaSb 2 O 6 :Eu 3+ , Bi 3+ phosphor is synthesized by solid-state reaction method in air. Their crystal structures are investigated. Luminescence properties of CaSb 2 O 6 :Eu 3+ , CaSb 2 O 6 :Bi 3+ , and CaSb 2 O 6 :Eu 3+ , Bi 3+ phosphors are compared, analyzed and explained, respectively. Tunable emission of CaSb 2 O 6 :Eu 3+ , Bi 3+ phosphor with excitation 298 nm can be observed by changing Eu 3+ or Bi 3+ concentration. Energy transfer (ET) and charge compensation in CaSb 2 O 6 :Eu 3+ , Bi 3+ phosphor are observed and analyzed via its luminescence properties. Lifetimes of CaSb 2 O 6 :5 %Eu 3+ , yBi 3+ phosphor (0.5 ≤ y ≤ 5 mol%) are investigated, which further confirm that ET process can be formed between Eu 3+ ion and Bi 3+ ion. The luminous mechanism is explained via the energy level diagrams of Bi 3+ and Eu 3+ ions. The emission properties indicate that CaSb 2 O 6 :Eu 3+ , Bi 3+ phosphor has a potential application for white LEDs based on near UV (~394 nm) LED chip.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
LUMINESCENCE
·
2017
·Vol. 32
·期 6
·908-912
·
IF 1.509
Renping Cao,Jinlong Zhang,Wudi Wang,Qianglin Hu,Wensheng Li,Wen Ruan,Hui Ao
CaSnO 3 :Bi 3+ blue-emitting phosphor was synthesized using a high-temperature solid-state reaction method in air. The crystal structures and luminescence properties were investigated. A broad emission band peaking at ~448 nm upon excitation at 262 and 308 nm was observed in the range 330–680 nm at room temperature due to 3 P 1 → 1 S 0 transition of the Bi 3+ ion. The chromaticity coordinate was (0.1786, 0.1665). The optimal Bi 3+ ion concentration was ~0.6 mol% in CaSnO 3 :Bi 3+ phosphor. The emission spectrum of CaSnO 3 :Bi 3+ phosphor showed a blue-shift with increasing temperature from 50 to 300 K due to the influence of temperature on the electron transition of the Bi 3+ ion. The emission intensity of CaSnO 3 :Bi 3+ phosphor may be increased ~1.45 times by co-doping Li + ions as a charge compensator and fluxing agent. The luminescence mechanism is explained by a configurational coordinate diagram of Bi 3+ ion in CaSnO 3 :Bi 3+ phosphor.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 7
·5287-5292
·
IF 2.324
Cao Renping,Quan Guanjun,Shi Zhihui,Gou Qingdong,Chen Ting,Hu Zuofu,Luo Zhiyang
Novel LiBaPO 4 :Bi 3+ yellow-emitting phosphor is synthesized by high temperature solid-state reaction method in air. With excitation 260 nm, LiBaPO 4 :Bi 3+ phosphor emits yellow light with the chromaticity coordinate (0.4272, 0.4657) and color rendering index 77.7. Emission band peaking at ~ 588 nm of LiBaPO 4 :Bi 3+ phosphor in the range of 400–790 nm is attributed to the 3 P 1 → 1 S 0 electron transition of Bi 3+ ion. Excitation band monitored at 588 nm in the range of 220–300 nm is assigned to the 1 S 0 → 3 P 1 electron transition of Bi 3+ ion. The optimal Bi 3+ ion concentration in LiBaPO 4 :Bi 3+ phosphor is ~ 1.0 mol%. Time resolved spectra and fluorescence lifetime data confirm that there is only Bi 3+ ion luminous center in LiBaPO 4 :Bi 3+ phosphor. The luminous mechanism is analyzed by configurational coordinate diagram of Bi 3+ ion. The experiment results are helpful to develop other new Bi 3+ -doped optical materials for solid-state lighting.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 7
·2653-2663
·
IF 6.4
Ruize Liu,Haiyan Wu,Shangwei Wang,Weihong Yuan,Su Zhang,Ran Pang,Lihong Jiang,Da Li,Chengyu Li,Hongjie Zhang
In this work, a series of novel, broadband, cyan-green emitting Ba3LuGa2O7.5:Bi3+ phosphors are prepared to bridge the cyan gap through a simple high-temperature solid-state reaction method. Their crystal structures, morphologies, luminescent properties, temperature-dependent emission spectra, temperature-dependent lifetime decay curves and quantum efficiencies were investigated in detail. Upon 351 nm excitation, the phosphor presents cyan-green emission with the main peak located at 500 nm, corresponding to the 3P1–1S0 transition of Bi3+ ions. The emission intensity of BLGO:0.02Bi3+ phosphors is greatly enhanced when introducing a suitable flux. The value of external quantum efficiency is advanced from 9.43% to 30.93%. According to the luminescence intensity and thermal quenching properties of the phosphor, the potential applications of BLGO:Bi3+ in the two fields of WLEDs and optical temperature sensing were explored. Since the excitation band of the phosphor can match well with that of the near-ultraviolet chip, combined with commercial phosphors, the BLGO:0.02Bi3+ phosphor is employed to obtain a full-spectrum WLED device with a higher color rendering index (CRI, Ra = 93.5), and a lower correlated color temperature (CCT, 4523 K). In the temperature range of 293 to 498 K, the relative sensitivities Sr and S are calculated to reach the maximum value of 2.05% K−1 and 2.21% K−1, respectively. These results indicated that the prepared BLGO:Bi3+ phosphors have potential application prospects as full-spectrum WLEDs and in temperature sensing.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Solar RRL
·
2023
·Vol. 7
·期 12
·2300215
·
IF 7.9
Siwei Gu,Zheng Lu,Shuai Zou,Chengkun Wu,Chen-wei Peng,Mengfei Ni,Zhenzhen Chen,Hao Huang,Hua Sun,Haibo Wang,Xiaohong Zhang,Xiaodong Su
Herein, a solid strategy to prepare bifunctional SiO 2 coatings (BSCs) with both antireflection and luminescence downshifting properties by in situ generating YVO 4 :Eu 3+ ,Bi 3+ phosphors in SiO 2 antireflection coatings (ARCs) is reported. Namely, a self-prepared precursor solution of the downshifting phosphors is added to a mixture of commercial SiO 2 sol solution and ethanol to uniformly coat the surface of quartz glass; therefore, a novel composite porous SiO 2 coating containing in situ generated YVO 4 :Eu 3+ ,Bi 3+ phosphors (labeled SiO 2 @YVO 4 :Eu 3+ ,Bi 3+ coating) is formed on the glass surface after annealing. The SiO 2 @YVO 4 :Eu 3+ ,Bi 3+ BSCs can effectively convert ultraviolet (UV) region photons to visible photons that are well absorbed by silicon solar cells and have better transmittance than pure SiO 2 ARC. As proof-of-concept applications, the as-prepared optimal SiO 2 @YVO 4 :Eu 3+ ,Bi 3+ coating can effectively improve the photoelectric conversion efficiency (PCE) of tunnel oxide passivated contact solar cells by 0.18%abs and decrease the UV-induced degradation value of the PCE of silicon heterojunction solar cells by 0.62%abs compared to the pure SiO 2 ARC. The results demonstrate that in situ generating luminescence downshifting phosphors in the SiO 2 ARC of photovoltaic glass is a promising way to improve the PCE and UV stability of silicon solar cells.
研究领域:
材料科学
·
光伏技术
·
光电子学
✓ 已验证
DOI
高影响因子
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